Feed-grinder.



I. G. HOBART & W. E. REIILING.

FEED GRINDER.

APPLICATION FILED APR. 17. 1908.

Patented 055.51909.

4 SHEETS-SHEET l.

Mil?

P. G. HUBART d@ W. E. REULING. FEED GRINDER.

4 SHEETS-SHEET 2.

Patented 0ct.5,1909. 'y

P. GHOBART W. S. RBULING. 'FEED GRINDER.

I APPLICATION IIL-ED APB-.17',1908, A v 935,985 Y Patented Oct. 5,1909.

- P. G. HOBART & W. E. REULNG.

FEED GRINDER. APPLICATION FILED APB.. 17,1908.l

; 4rammed oet. 5,1909.

4 SHEETS-SHEET 4,

Application ilei April l?, E S.

pecificatcsi o1? Letters Eaten-.

To ai! whom 'may concern:

e iiy known man; we, lf'nnniimn Gf. iii niiirr and ii'iiifrin: E. inULiNe, cnf .ens ei ihejniied ritmes, residing et Beloi, Reek county, "iiliecenein, hei. invenicd eert.

new z id ueefui niproveinenie ,Fe/erf Crrnn ere9 of n'hieh (he ieiiowing 1S e speer in' inveniion relnee Le eeii grinders ehpccinliy these intended io grind euin en the coh, :nid ih@ object oi? die invention i5 ie provide certain n-rei, features oi` eonstruction whereby the eiiieiency end {inruhiiity of he grinder is inereasefi.

@ne of the features of noveity in our grinder ib' hevniechiniisin fer controlling ihc .feed opening between the crnehei: par?. und the grinding (iisits.

Another novel Liieanire is the ineens 'or holding' ihe grindingiiisiis on( of conizic; with cnr-h oi'her when there in; no nniierini heilig ground between ihein.

Other nm'ei fe-.nues nre hc ineens hy which the disks nre perinited io nieve aprir in ease any stone7 piece of nietaii or @Lhei` ohsi'rnetien sheuid come between rhein ,isov the construction oi' the casier iniosing ihe grinding' disks anni paris immediately :issocinted therewith. L

We ohinin our ehjecis by she mechanism iihisriiied in the accompanying drawings,

in which:

Figure 'i ie a side eievefion (if the essernhieci innehine excepiing he iegs or supporting ranieivoric. ifi"i is :i eeciiioniii eievz Lion izxken lengthwise 0i the Shzie. The

pinne nf the i'ignre is indicated by the iine 2-2 Fig. i. Fig. 3 is :in end eievuion 100king from the `grinding1 enii of the machine. feige. 5, 3, .7 and ere sectionsfiiien spcetiveiy on the lines like ei, (iw-5f il-7 und 3 8 of Fig., 9 perspecive View ef ene of the breaker i "10 is in preside 4View ei? the end hrea,M r

Fig. ii is edeeii seciionai ferred forni. i View when horizontziiiy through ihe center of the bearing remote from the grinf'iers shewing how it receives he iaerni thrust of the 'breakers due to the'spreader spring 50. F 12 is @vertical seetienei View of he. end hrnst hearing for the main siizif.

Similar numerals refer io sii'iiiizi1-1iiirte ihronhoni` the seveini"vie\vs.

The supporting staniiiirii 20 ie ronetrncizeii 'and inw u. recess 2S according izo Suiiabie design and ein-ries the hopper and the hed plete 2:2 in which the preii ary ci' Shing fakes in the preferred ilumine-e the end @hike 223 is hoited te seid anci these plates carry ihe heznii 1 and Qi respeetiv-eiy, wherein the main is jeurnned. Sind shuit is heth 'ri/.nimble and. siin vwithin its beer,n inge inni is driven by ihe hund wheel QT or other suitable ineens. in the preferred consiruct' ,in e pin e; nie through the shaft ernied in the end of the huh off -whe-ei 52T :is shown in. Fig. 2. A coiied compr ...ion Spring is inerpesed between i" inner anni of ehe huh an@V the bearing 21, :is :i rm" i, i of which the shaft is,` io i limited idzihie reietiveiy thereto.

Arranged 'upon the shui@ Hthin the con care imi'er portion of the hed plate Q2 :1re breakers C-.l sind Bi, shown rsepnrniei in Figi. i? :ind i in ifig. 2. Breaker 3:2 is prefernhiy of speoini i'orinr` icing pi'mideii with :i helical iiight B21* and located near the end of 4he hopper rendete from 'he disks for keeping Lhis portien of *ehe hopper und hed piane eieiir and forwnriiing the cohs ieri/'51rd the dighe. n thepre'iferreii 'erni, Shown in 2 und 5, .breaker has :i recess 32 adapted to receive lthe pin in such manner hnt the breaker roiiites with the Siniii; but is iongitudinziliy niornhie relativelyJhereo for n limited distance. if desired, pin may he manie of wood er other breekziioie nniterizii so ne to breuk hefere the machine wrecks iteeif in ense :in oiissigiueizien is enconniered. Breakers 3l und are zidzipieii to intel-leek eneyivith :inoher in sneh nninner that Ithey may he siipied over the shJi seiniraieiy but. coinnieneing ivih breaker 32. einch will rivive the one to i. The tceii ef n fire err i ce eeween the grinding c i v ie that :i cursing chamber 3G be provi eyoioi ti breakers 3i 'to cooperate with cutter 3T which intel-locks with i() reepeciveiy, anni shnwn in section- Ci i the breakers 3i so es; to rotate therewith and with shaft QG, the parte being cieariy showin in Figs. 2 nn. stationary grinding disk 3S hoie or otherwise rigidi-.y Secured 13o iwi piane 22 and has an aperture 39 through which material may enter the Space between the grining (hehe. in Jdie pire- .terred form this aperture 39 is segmental in outline as shown in Fig. 8. The amount of opening through the stationary grinding disk is regulated by means of a gate 40 located adjacent to the disk 38 fand-which is rotatable about shaft 26 as a center. Said gate has van aperture which by preference is similar in size and outline to the aperture 39 yin the stationary' grinding disk. The parts are so arranged that when the gate 4.0 is rotated it will vary the size of the opening into. said stationary grinder. Said gate is provided with an extension l1-1 whereby it may be rotated, said extension having a return vbend 42 adapted to engage the ange 43 of the cutting chamber 36 as clearly shown in Fig. 1. Said extension and return bend are apertured to receive a bolt-44 having a wingnut 45 thereonl and the parts' are so' arranged that when said nut is tightened it will canse the extension 4l and bend 42to clamp the flange 43 and hold the gate in set position. By this inea-ns the size of opening into the grinding disk may be regulated to a nicety by moving but a single member of the machine and the part may be set by merely screwing up the singie nut.

Opposed to the stationary rindin disk is a rotary grinding disk 4.6 w ich is olted or otherwise' secured to the spider 47' which rotates with shaft 26. The preferred means 1 of attachment of spider 47 to shaft 26 is pin when no material is 43,. shown in FigsfQ and 4. As the connection is thus rigid the spider' and rotary grinder not onl rotate with shaft 26 but produce a longitu ina] ovcment of said shaft in case the rotary grinding disk moves toward or from the stationary grinding disk.

ln order to permit such motion toward and from the stationary grinding disk there is, under normal conditions, a space between the hub 49 of spider 47 and the inside of end plate'23 as clearly shown in Fig. 2.

A coiled compression spring 50 encircles shaft 26 and is located between the two grinding disks vfor kecpinff' the latter apart in. the space betweenl them. in the preferred arrangement spring F0 bears at one end against the hub 49 of the spider e7 and at the other end against the cutter or breaker 3'?. The thrust thus set up in part 37 is transmitted through the breakers 31 to the breaker 32 which bears against the end of box or bearing 24. This p keeps parts 37, 3i and' 32 always in intel locked position and yet permits the lon'itndinal movement of the shaft when t e grinding disks vary their distance from each ot er.

ln order to permitthe rotary disk to yield when ,an obstruction is present and yetnorniaily hold the disk as close as it'shouldf, be to the stationary disk, an arm 51 is'A pivoted to arib or boss 52 formed upon the end plate 23,#the free end of said arm being v yieldingly connected to the end plate 23 byl a-tension spring 53 best shown in Fig. 1. The inward movement of arm 51 is limited by a stop 54- which contacts a suitable portion of said end plate. Pressure is trans-A mitted from arm 5l to shaft 2G through the regulating screw which screws into said lever in such position that its inner end contacts a' thrust bearing which inits preferred form consists of a block 5G, recessed to fit over thc end of the shaft 2G and convey oil thereto through a duct 56a' leading downward from the oil reservoir 56h as best shown in Figs. 2 and 12. lt is desirable to interpose one or more anti-friction disks 56a between the block and the end of the shaft. Screw 55 is rotated by a hand wheel 57, this wheel being held in set position by means of '4 stop 54: in contact with t e end plate 23.

The distance between the disks when in approached position may 'be regulated by rotating the hand wheel.- 57 i and thus increasing or decreasing thel pressure upon spring 50, spring 53 being strong enough to heid stop 54 in contact with end-plate 23 v except when a stone or other substantially non vcrushable object comes between the disks.

In order to provide motive' power for the operation of supplementary mechanism such as an elevator (not shown) it is desirable to spline a sprocket wheel 60 upon shaft 26 between bearing 25 and arm 5]., such cony nection. permitting longitudinal movement of shaft 26.

-The formation of the case which incloses thegrindin disks is of special convenience in our mac ine, its construction being best shown in Fi s. l, 2 and 4e. The cover 61 consists` pre erably or" sheet steel and is arched so as to come outside of and concentricwith the grinding disks. It is substantiallysemi circular in cross section and is provided at its lower edges with ianges 62 which beard 'on/the bed plate 22 and are apertured forreceive capV screws 63 (shown in Fig. 5.). The bottom of the case is formed by' the mein trame itself which ter of tie disks. i The end plate 23 which bolts to the main frame forms the end of. hekcase and completes the closure about the 1s s. are readily accessible and may be removed by merely unbolting the end plate and removing the pin 48.

Having thus described vour invention, what With this construction the disks.

-coines a prximately to thelevel'o the c en- Y we claim as new and desire to secure by Letters Patent, is:

1. ln a feed xejrinder, a stationary frame i provided with a concave, a shaft jonrnaletl in Said'franie, a rotary grinding disk rigidly cured to said shaft, a. statiomxriv grinding disk i rigidly secured to said t' aine and adapted to l cope 'ate with the rotarjv grindingr disk, a of interlocking breakers on Said shaft in pol sition to eoperate with the concave, the end l breakerhavingf a longitudinal recess Alherei in, a pin in the shaft adapted toenter the reeesa in said end breaker for rotating the Same, a journal bearirnr in the frame adapted to Contact with Sait` recessed breaker for i holding' it against longitudinal movement i on the shaft in one direction, terposed between the'rotarjy7 grinding disk and the other end breaker for holding said breakers in locked engareinent, and meansfor adjusting said relatively to its support to thereby increase or decrease the strain on said Spring.

f2. ln a feed grinder, a stationary prorided with a concave,

a spring inframe a shatt gournaled l in said trarne, a rot-ary grinding (liek rigidi)v secured to said Shaft, a stationary grirnling;` disk rigidly secured to said frame and adapted to cooperate with the rotar)7 grindiiw disk,

a set of interloeking breakers on Said Shaft in position to (-oiperate with the eoneare. the end breaker haring a longitudinal recess therein, a pin in the shalt. adapted to enter the recess in said end breaker' for rotmting the saine. a journal bearing in the frame adapted to Contact with Said reeeaseil breaker for holding 1t against longitudinal inoreinent on the shaft in one direction, a spring*Y interposed between the rotary, grind-- ing disk and the other end breaker 'for hohling said breakers in locked engagement, and means; cooperating with the shalt for holdingl aid j frindinedisk in Contact with Said Spring to thereby keep said breakers in locked engagement.

FR i-V'Nllilll Cf.. HOBRT. l i 'ALTER l. llllLlNr. ltlitnesses l. Eo. B. lnoinsoai, E. E. SMe'rirs, 

